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o

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Indicate by check mark whether the registrant is an emerging
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On December 13, 2017, Amyris, Inc. (the “
Company
”)
appointed Tina Maloney as its Chief Accounting Officer, reporting to the Company’s Chief Financial Officer.

Prior to joining the Company, Ms. Maloney, 55, served in various
financial roles for The Cooper Companies Inc. from 2005 through 2017, most recently holding the position of Vice President, Corporate
Controller and Principal Accounting Officer from January 2014 through January 2017. Ms. Maloney also previously served in several
senior financial leadership roles at Sola International Inc. and IESL, Inc. Ms. Maloney holds a Master of Business Administration
degree from William Woods University and a Bachelor of Science degree in Business Administration from Columbia College.

Pursuant to an offer letter entered into between the Company and
Ms. Maloney on December 13, 2017 (the “
Offer Letter
”), Ms. Maloney is expected to commence employment
with the Company on January 2, 2018. The Offer Letter provides for an initial annual base salary for Ms. Maloney in the amount
of $280,000. Ms. Maloney will also be eligible to receive an annual performance-based bonus, which is based on an initial bonus
target of $112,000, subject to her achievement of performance objectives. In connection with Ms. Maloney’s appointment, the
Company agreed to grant Ms. Maloney a stock option award and a restricted stock unit (“
RSU
”) award under
the Company’s 2010 Equity Incentive Plan. The equity awards to Ms. Maloney consist of: (i) a non-statutory stock option to
purchase 19,200 shares of the Company’s common stock (vesting over four years, with 25% of the shares subject to the option
vesting upon completion by Ms. Maloney of her twelfth month of employment with the Company and the remainder vesting over the following
three years in 36 equal monthly installments) at an exercise price equal to the fair market value of the Company’s common
stock on the date of the grant; and (ii) an award of 12,800 RSUs, which would vest over three years in equal annual installments,
in each case subject to continued service with the Company through the applicable vesting date. The Company also agreed to provide
Ms. Maloney with a one-time signing bonus in the amount of $10,000, which amount would be repayable by Ms. Maloney in full in the
event she voluntarily terminates her employment prior to the completion of one year of service with the Company.

Ms. Maloney will be eligible to participate in the Company’s
compensation and benefits programs for employees on the same basis as other eligible employees, including health insurance; vacation,
holidays and sick days; life insurance; disability insurance; and a Section 401(k) plan with an employer matching contribution.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has
duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.